How to Overclock Raspberry Pi 4 to 2.0 GHz
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I also would like to see this setup with the fan not active as that heatsink and the margins of cooling it has, it could be enough for many use cases.
OK found a video that does a more indepth review of this cooler and sound. https://www.youtube.com/watch?v=tie6r5ymUug
Sure the processing I'm doing, I could batch, but real-time makes like so much better in the instance I'm using it for.
That is completely up to you to decide.
IIRC Raspi4 does not come with a fan so you need an aftermarket one. There are plenty of silent fans. It gets easier if you can increase the size, because bigger fan blades can be turned slower for the same airflow at reduced noise levels.
Equally I'm ok with some noise, as long as it is not within the range I'm recording and as such, easily filtered out. So whilst a small fan may make a higher noise, it also makes a higher frequency noise, larger fan == lower frequency noise and that may be an issue in the my use case.
But early days, be lots of alternatives and choice out there, though looks very promising.
Just wasn't aware the RPi4 could be overclocked, so that's kinda a bonus.